No one said a word to me when I was living on KFC, kebabs, burgers, and steak.
Now I eat a plant based diet people can't wait to tell me how unhealthy I must be.
I'd respect anti-vegans a lot more if they just stated outright that 'they wanted to eat meat, and veganism gaining popularity makes them feel guilty' as opposed to layering on 6 inches of outright lies or pseudoscience, and then stating the exact same reason.